JP2009203569A - Face shield mounting apparatus in helmet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To largely hold a face shield surface by a simple mechanism in a front small space part in a four connection type helmet. <P>SOLUTION: The face shield mounting apparatus has a constitution in which at the front of the tip of the front right and left hammock leg parts of a hammock 8 is arranged in a cantilever constituting a crosssectional approximately U-shaped slide part dented from the side edge of the outside of the leg parts toward a front center; a latching hole as a latching tool to be latched and fastened to a hammock bracket is constituted at the front of the cantilever; the fixing part of the holder 9 of the face shield is integrally attached to the front of the ceiling part of the hammock 8; a rail for lifting and lowering the face shield is bored below the fixing part through the holder 9 to form a shield guide; a fixing piece is extended right and left from the lower end part of the shield guide, and the tip part of the fixing piece is fastened to the tip part of the leg parts of the front right and left hammock 8 to vertically slidably mount the face shield on the rail. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a face shield mounting device in a helmet, and in particular, a locking device for a leg portion of a front hammock is substantially a cross-sectional view of a concave portion formed in the center side formed on the front side of the distal end portion of the leg portion. A locking tool is configured with a locking hole on the front surface of the cantilever beam that constitutes the letter-shaped slide part, and the face shield passing through the slide part at the tip of the leg part of the front hammock does not interfere with the face. The present invention relates to a face shield mounting apparatus in which a shield can be moved up and down widely.

  When supporting the hammock on the shell of the helmet, when the number of support portions for supporting the hammock formed on the shell of the helmet is four, that is, in the shell of the so-called quadruple helmet, the support portion In other words, the four support positions are arranged at substantially equal intervals on the inner surface in the vicinity of the opening of the shell as compared with the eight-point support type shell. It is difficult to obtain a large space for the holding frame for attaching the protective shield surface in the shell space in front of the hammock by compressing the space in front of the inside.

In this way, in a four-joint type helmet that supports the hammock on the shell at four points, it is difficult to take a large space and a wide space in front of the shell, so in order to solve the problem caused by mounting the face shield in such a space, The present applicant has previously filed Japanese Patent Application No. 2007-174423. Since the technical matters related to this application have many common points with the present invention, they will be described with reference to the drawings in order to contribute to an understanding of the present invention as disclosed in the prior art. The prior art also enters the conventional example in comparison with the present invention.
Specification and drawings of “Japanese Patent Application No. 2007-174423”

  FIG. 1 is a top view as seen from above with the opening edge of the helmet facing up. In FIG. 1, reference numeral 1 denotes a shell (shell) that constitutes the main body of the helmet. The shell can be thermoplastically molded using a suitable plastic working material, for example, a synthetic resin such as HDPE (high density PE). Reference numeral 1A denotes a visor (cover plate, sunshade plate), which is formed integrally with the shell 1 body. In the drawing, 1B and 1B are hammock hooks provided on the front left and right and rear left and right in the vicinity of the inner surface of the opening edge of the shell. It is a member that is arranged on the edge of the shell at approximately equal intervals and hooks the hammock locker at four support points, and this is also integrally formed with the shell so as to be integrated with the shell 1 and the shell 1 body. Formed.

  FIG. 2 is a top view of a state in which a single hammock attached to the inner surface side of the shell 1 is flatly developed from the inside with the front side on the left side. In the figure, reference numeral 2 denotes a hammock, which is a member having an action of absorbing and mitigating external force so as not to indirectly receive external force applied to the shell and give an impact to the wearer's head. The material of the hammock is flexible so that it can flexibly cope with external force while having sufficient mold holding performance, and flexible so that it can respond flexibly when the shell is attached to and detached from the hammock hooks 1B and 1B. It has sex. Such a hammock material has good moldability and can be molded from a material having appropriate mold holding properties and flexibility, for example, a synthetic resin such as polyethylene. In the figure, reference numeral 2A denotes a ceiling part of the hammock, and a plurality of rectangular through holes 2B are formed in the ceiling part 2A in order to impart elasticity and air permeability to the hammock. Reference numeral 2C denotes a hammock leg portion branched from the ceiling portion 2A of the hammock at substantially equal intervals to support the hammock 2, and of course four pieces are provided to support the hammock 2 at four points with respect to the shell 1. (2C, 2C, 2C, 2C).

In the figure, 2D is a hammock locking tool, which is a member for attaching and fixing the hammock 2 to the shell 1 of the helmet. The hammock locking device 2D is formed by integrally forming the hammock ceiling portion 2A and the leg portion 2C at the lower end portion of the hammock leg portion 2C. The hammock locking device 2D includes locking device slide portions 2D ₁ , which are formed to project from the inner wall surfaces of the left and right sides of the hammock leg portion 2C in order to slide-engage with the hammock hooks 1B, 1B of the shell ₁ . 2D ₁ and a locking tool ascending stop stopper 2D ₂ constituted by a substantially T-shaped bottom edge of a hammock leg 2C that suppresses the lifting of the locking tool slides 2D ₁ and 2D ₁ and the locking tool slide. It consists of a pair of locking tool detachment stop stoppers 2D ₃ and 2D ₃ that are formed to project left and right on the inner wall surface side of the shell of the hammock leg that suppresses accidental detachment of the parts 2D ₁ and 2D ₁ .

In order to hang the hammock locking tool 2D on the hammock hooks 1B and 1B of the shell 1, the locking tool slides 2D ₁ and 2D ₁ at the tip of the hammock leg 2C having flexibility are used. The hammocks hooks 1B and 1B are slid upward while being sandwiched between them. At that time, the locking tool lift stop stopper 2D ₂ comes into contact with the lower ends of the hammock hooks 1B and 1B, and the slide lifting of the locking tool slide portions 2D ₁ and 2D ₁ is stopped. When the locking tool slide portions 2D ₁ and 2D ₁ are mounted, the locking tool detachment stop stoppers 2D ₃ and 2D _{3 in} front of the locking tool slide portions 2D ₁ and 2D ₁ prevent the mounting. In order to prevent this, the upper part of the locking tool slide parts 2D ₁ and 2D ₁ can be folded inwardly toward the inner side of the shell, and the hook slide can be guided to the hammock hooks 1B and 1B.

On the other hand, the hammock latch 2D mounted on the hammock hooks 1B, 1B slides the hammock latch slides 2D ₁ , 2D ₁ and then hangs them, and then the latch detachment stop stopper 2D ₃ , 2D ₃ exists, and this flexibly corresponds to the position where it abuts on the upper end of the hammock hooks 1B, 1B, so that the latch slide parts 2D ₁ , 2D ₁ are unexpectedly moved to the hammock hooks 1B, 1B. It is avoided to leave downward from. By the way, when removing the locking tool slides 2D ₁ and 2D ₁ from the hammock hooks 1B and 1B, the locking tool detachment stop stoppers 2D ₃ and 2D ₃ are used by utilizing the flexibility of the hammock leg 2C. Then, it can be bent to the inside of the shell to remove the state of disengagement from the hooks 1B and 1B, and then the engaging slides 2D ₁ and 2D ₁ can be slid down to disengage the engagement.

  In FIG. 2, 2E is an engagement hole drilled in the hammock leg 2C, and other members can be attached through the engagement hole 2E. That is, the engagement fixing is practiced by engaging a holding frame or a headband of a protective shield surface, which will be described in detail later, with the engagement hole 2E with an engagement pin. That is, according to the present invention, as will be described later in detail, by using the engagement hole 2E of the hammock, the shell 1 and the protective shield can be extended without providing the shell 1 with a separate support mechanism such as a rivet. The surface as well as the headband can be attached to the helmet.

FIG. 3A is a front view of the hammock locking tool 2D provided on the lower portion of the leg portion 2C of the hammock, as viewed from the shell 1 side with its end facing up, and FIG. FIG. The hammock locking device slide portion 2D ₁ and the locking device disengagement stop stopper 2D ₃ provide a distance from the inner wall of the shell 1 with respect to the leg portion 2C of the hammock in the vicinity of the hammock locking device 2D, and the hammock locking device. A mode is shown in which 2D is conveniently attached to and detached from the hammock hooks 1B and 1B. FIG. 3C shows a state in which the hammock locking device 2D provided at the lower end of the leg portion of the hammock is attached to the right hammock hooks 1B and 1B where the visor 1A of the shell exists and the opening edge is directed upward. It is the partial front view seen from the inner side of the shell 1 to show. The hammock latch 2D is securely attached to the hammock hooks 1B and 1B of the shell 1.

  FIG. 4 is a front view of the holding frame of the protective shield surface attached to the engagement hole 2E of the front hammock leg 2C via the engagement pin when viewed from the inside of the shell with the front end of the leg of the hammock facing upward. Only the relationship between the holding frame and the hammock). In the figure, reference numeral 3 denotes a protective shield surface holding frame, and the protective shield surface holding frame 3 is a plate-like object having mold retainability, and is a material having flexibility so as to flexibly cope with external force. Molded. It can be molded from a thermoplastic resin material having good moldability, for example, a synthetic resin such as polyethylene or polystyrene. In the figure, reference numeral 3A denotes a mounting through hole formed in the holding frame 3. An engaging pin is inserted into the attachment through hole 3A, and a leading end locking portion of the engaging pin is engaged with an engaging hole 2E formed in a leg portion 2C of the hammock to attach the holding frame 3 to the hammock. 3B shows a long hole rail for attaching a protective shield surface. In the illustrated embodiment, the long hole-like rail 3B in the central part is formed long, and the long hole-like rails 3B, 3B on both the left and right sides have a length shorter than that in the central part. In order to further tighten the headband, which will be described later, in the mounting state shown in the figure, an engaging pin into which the slit hole of the headband has been inserted in advance is inserted into the mounting through hole 3A. The locking portion is locked in the engaging hole 2E of the leg portion 2C of the hammock.

  FIG. 5 is a partial front view seen from the inside with the lower edge of the headband described above facing upward. In the figure, reference numeral 4 denotes a headband, and 4A denotes a headband body. The headband 4 is formed of a material having a mold holding performance and a soft attribute, that is, flexibility. The headband main body 4A is provided with various circular holes and elliptical holes in order to induce air permeability and flexibility. In the figure, reference numeral 4B denotes an attachment piece, which is a portion extending upward (downward in the figure) for attachment to the engagement hole 2E of the hammock. A plurality of slit holes 4C are formed in the mounting piece 4B. The engaging pin 5 is inserted into the slit hole 4C, and is further inserted into the attachment through hole 3A of the holding frame 3 to be engaged and fixed to the engagement hole 2E of the hammock. That is, the headband 4 and the holding frame 3 are fastened together with the engaging hole 2E of the hammock via the engaging pin 5.

  FIG. 6A is a cross-sectional view of a form in which the headband 4 and the holding frame 3 are fastened together with the engagement hole 2 </ b> E of the hammock 2. In the same figure, 5 is an engaging pin as described above, 5A is the head of the pin, 5B is the core of the pin, and 5C is the pin end locking portion. FIG. 6B is a view showing a form of the distal end locking portion 5C of the engaging pin 5 in which the holding frame and the headband are fastened together with the engagement hole 2E of the hammock viewed from the shell side. Yes (headband omitted). The locking end 5C of the engaging pin 5 has a slit hole 4C formed in the headband mounting piece 4B and a mounting frame mounting hole 3A through the flexibility of the headband mounting piece and the holding frame. After the insertion, the last is engaged and fixed to the engagement hole 2E of the hammock.

  FIG. 7 is a front view of the holding frame 3 with a protective shield surface attached (the shell, hammock, and headband are omitted). In the figure, 6 indicates a protective shield surface and 7 indicates a slider. The protective shield surface 6 is formed by molding a synthetic resin of a transparent or other light transmissive material, and is curved with the front center as a top so as to match the face of the wearer. If the protective shield surface is light transmissive and can clearly see the object, it can be molded from synthetic resin such as polycarbonate and polyethylene. In addition, if an edge protector is attached to the lower edge of the protective shield surface so as not to cause an accidental injury on the wearer's face, the wearer's safety can be further ensured. Yes (protector, not shown).

  In FIG. 7, reference numeral 7 denotes a slider, which is loosely fitted in a slider mounting hole 6 </ b> A formed in the upper end portion of the protective shield surface 6. The slider 7 comprises a web constituting an axial core and flanges extending in the lateral direction from both ends of the web, and is made of a flexible synthetic resin material. After mounting the slider 7 in the slider mounting hole 6A of the protective shield surface 6, the flange on the rear side of the slider is connected to the long hole rail 3B of the holding frame 3 on both sides of the long hole rail. Use for mounting and mounting. Alternatively, either one of the front and rear flanges of the slider 7 is removed from the shaft-shaped core that is the slider web, and the slider-shaped core is inserted into the long-hole rail 3B. The flanges may be attached by pressing so that both sides of the rail 3B are sandwiched between the rear flange and the front flange. The degree of sliding of the slider 7 with the long hole rail can be adjusted by the degree of pressing of the flange. That is, when the slider is mounted on the long hole rail by pressing the flange strongly, resistance is generated in the slider sliding up and down, and the mounting position can be reliably maintained even during active labor use. In this way, the protective shield surface 6 is attached so as to be slidable up and down along the long hole rail 3B of the holding frame 3 via the slider 7. With this configuration, while the wearer is working, the protective shield surface 6 is lowered and put into use (as shown), and when not in use, the protective shield surface 6 is raised along the elongated rail 3B. It can be slid and kept in the storage position.

  As described above, in a four-point support type helmet that supports a hammock on a shell at four points, it is difficult to take a large space and a wide space in front of the shell, and in order to attach a protective shield surface to such a rare space, a protective shield surface is provided. In order to avoid the configuration of the conventional example which used the fixing means for directly attaching the holding frame to the helmet to the helmet, the holding frame for supporting the protective shield surface for face protection is perforated. The engagement pin is inserted into the mounting hole and the slit hole formed in the fixing piece of the headband, and the engagement frame is fastened together with the holding frame for supporting the protective shield surface and the headband. The end locking portion of the wearing pin is engaged and fixed to the engagement hole formed in the two legs of the hammock located on the visor side, and further, The frame is formed of a flexible material and has a long hole-like rail that is vertically drilled. The protective shield surface is held on the long hole-like rail by slidingly attaching the protective shield surface via a slider. The invention according to Patent Document 1 (conventional example) employs a configuration in which the frame is attached to the hammock.

  However, in such a prior example, a holding frame for supporting the protective shield surface is provided inside the separate hammock, which increases the number of parts.

  In addition, since a holding frame for supporting the protective shield surface is separately provided inside the front hammock leg, there is a problem of compressing the space inside the hammock leg.

  Further, in the space inside the front hammock, there is a problem that the space is limited and it is difficult to increase the length in the vertical and horizontal directions of the face shield (protective shield surface) that protects the face.

  Therefore, in a four-piece support type hammock helmet, when mounting the face shield to the helmet, the number of parts should be reduced, the inner space of the front hammock leg should not be compressed, and the surface should be as large as possible. In order to attach the face shield, technical problems arise, and the present invention aims to solve the above problems.

The present invention is proposed in order to achieve the above object, and the invention according to claim 1 forms a pair for attaching hammock to the front left and right and the rear left and right of the inner surface in the vicinity of the opening edge of the helmet shell. A hammock bracket is formed, and a locking tool formed on a leg portion of the hammock is locked and fixed to the hammock bracket, and an engagement hole is formed in the leg portion in the vicinity of the locking tool of the hammock. In the helmet that attaches the fixed piece of the headband to the hole,
Provided on the front surface of the front end of the leg part of the left and right hammock of the hammock is a cantilever beam that constitutes a substantially U-shaped slide part that is concave from the outer side edge of the leg part toward the front center, A locking tool is configured with a locking hole for locking and fixing to the hammock bracket on the front surface of the cantilever,
A mounting portion of a face shield holder is integrally attached in front of the ceiling portion of the hammock, and the holder forms a shield guide by drilling a rail for raising and lowering the face shield below the mounting portion. The mounting piece extends from the lower end of the guide to the left and right, and the tip of the mounting piece is fixed to the tip of the leg part of the front left and right hammock so as not to interfere with the face shield sliding the slide part, A helmet face shield mounting device in which a face shield is slidably mounted on the rail.
According to the second aspect of the present invention, a pair of hammock brackets for attaching hammocks is formed at four front left and right and rear left and right inner surfaces in the vicinity of the opening edge of the helmet shell, and the hammock brackets are formed on the legs of the hammock. In the helmet that locks and locks the formed locking tool, drills an engagement hole in the leg portion in the vicinity of the locking tool of the hammock, and attaches a fixing piece of the headband to the engagement hole.
Provided on the front surface of the front end of the leg part of the left and right hammock of the hammock is a cantilever beam that constitutes a substantially U-shaped slide part that is concave from the outer side edge of the leg part toward the front center, A locking tool is configured with a locking hole for locking and fixing to the hammock bracket on the front surface of the cantilever,
The mounting portion of the face shield holder is integrally attached to the front part of the ceiling of the hammock, and the holder is provided with a thin hinge part that bends backward once from the attachment part, and a thin hinge part that is folded obliquely forward and downward from the rear. A shield guide having slit-shaped rails that are bent and formed to elevate and lower the face shield, and a mounting piece is extended from the lower end of the shield guide to the left and right, and the tip of the mounting piece is moved to the front left and right hammock A helmet face shield that is fixed to the tip of the leg so as not to interfere with the face shield that slides the slide part, and is mounted on the slit-like rail through a shield clip so that the face shield can be slid up and down. A mounting device is provided.

  The invention according to claim 1 of the present invention constitutes a substantially U-shaped slide section in a sectional view that is recessed from the outer side edge of the leg portion toward the front center on the front end portion of the leg portion of the left and right hammock of the hammock. Since the locking tool is configured with a locking hole that locks and adheres to the hammock bracket on the front surface of the cantilever, a four-point support helmet A hammock leg locking device for locking to a hammock bracket existing on the right and left of the front is formed on the front surface of the cantilever, and the face shield slides on the slide portion while avoiding the hammock bucket. In other words, it is possible to increase the width of the face shield. And since there is no particular change in the configuration of the helmet and the hammock bracket integrally formed therewith, it can be easily replaced by changing the hammock, so it can be shared with the conventional helmet it can. That is, a helmet without a shield can be easily changed to a helmet with a shield.

  In addition, a mounting portion of the face shield holder is integrally attached in front of the ceiling portion of the hammock, and the holder forms a shield guide by drilling a rail for raising and lowering the face shield below the mounting portion. Extending the mounting piece from the lower end of the shield guide to the left and right, and fixing the tip of the mounting piece to the tip of the leg of the front left and right hammock so as not to interfere with the face shield sliding the slide part, When the face shield is mounted on the rail so that it can slide up and down, the hammock and the face shield holder can be attached together as a result of the hammock being attached, and there is an increase in space and parts to supply the face shield holder as a separate part. The configuration becomes simple and contributes to cost reduction. Furthermore, since the face shield is guided along the rail, the slide guide slides at the tip of the leg portions of the front left and right hammocks, so that the shield guide can be moved up and down stably.

  In addition to the effect of the invention described in claim 1, the invention described in claim 2 integrally attaches the attachment portion of the face shield holder in front of the ceiling portion of the hammock, and the holder extends from the attachment portion. Since there is a shield guide provided with a slit-like rail that is bent and formed through a thin hinge part that bends backward and a thin hinge part that is folded back diagonally forward and backward, the face shield is lifted. The upper part of the shield guide with the pierced rail extends upward in front of the ceiling part of the hammock and extends rearward in front of the ceiling part, making it possible to store a long face shield in the vertical direction. A large face shield can be installed in the vertical direction. Therefore, the protection range of the face shield is widened, and the work efficiency of the wearer can be improved.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, the best embodiment of the invention will be described with reference to the drawings. In the description of the embodiments of the present invention, the drawings, symbols, members, and parts common to the previous conventional examples will be described using the drawings and symbols described above. In addition, when the configuration and function described in the conventional example are the same, there is a case where the description is not repeated to avoid duplication.

  FIG. 1 shows a shell (shell) of the helmet according to the present invention, which has the same structure as the helmet shell used in the description of the conventional example. That is, the helmet shell 1 shown in FIG. 1 is also the helmet shell of the present invention. In the figure, reference numerals 1B and 1B denote a hammock bracket for pairing and engaging a hammock locking tool, which is synonymous with the hammock hook described in the conventional example. The structure, material, molding method, and the like of the helmet are the same as those described for the hammock shell shown in FIG.

  8A is a bottom view (bottom view) of the hammock of the present invention as viewed from the human head side, FIG. 8B is a front view of the hammock, and FIG. 8C is a right side view thereof. The figure is shown. As for the hammock, the conventional example has been described with reference to FIG. 2, but basically there are many common points with the hammock 2 of the conventional example. However, the hammock of the present invention is different in that the legs of the left and right hammocks have different structures and the ceiling portion of the hammock and a face shield holder described later are integrally coupled. Therefore, this will be explained separately using this figure. In the figure, 8 indicates a hammock, 8A indicates a ceiling portion of the hammock, and 8B indicates air holes formed in the ceiling portion.

What is common to conventional hammocks is the configuration of the legs of the left and right hammocks. That is, in the leg portions 8C and 8C of the left and right hammocks, 8D and 8D are hammock locking devices, 8D ₁ and 8D ₁ are locking device slide portions, 8D ₂ and 8D ₂ are locking device lifting stop stoppers, and 8D ₃ , 8D ₃ respectively show stopper release stop stoppers. These are the hammock legs 2C, 2C, the hammock locks 2D, 2D, the lock slides 2D ₁ , 2D ₁ , the lock lifting stop stopper 2D ₂ , described above according to FIG. 2D2, fastener disengagement stop stopper 2D _3, has a 2D ₃ a similar structure, where the original similarly for describing function, also the function of the locking tool in the leg of the rear left and right hammock present invention It applies.

  Since it is as above-mentioned, the engagement of the hooks of the leg portions 8D and 8D of the left and right hammocks of the present invention and the hammock brackets 1B and 1B formed on the helmet was explained when the conventional example was shown. The description in FIG. 3 (c) and the description content are almost the same, but overlap each other, so reexamination is avoided.

  In the figure, 8F and 8F indicate the front and left hammocks of the hammock 8, and the engagement holes 8E and 8E formed in the legs 8F and 8F are formed in the rear left and right legs 8D and 8D. Together with the provided engagement holes 8E, 8E, this contributes to engagement when the headband is attached. These engagement holes 8E and 8E have the same configuration as the engagement holes 2E and 2E of the conventional example, and their functions are also the same. That is, in the helmet of the present invention, the headband is attached to the inside of the hammock in order to gently touch the human head of the helmet user and absorb sweat and moisture, and is shown as a conventional example in FIG. The thing similar to the headband 4 can be used as an embodiment of the present invention. At that time, the attachment of the headband to the engagement holes 8E, 8E, 8E, 8E drilled in the leg portion of the hammock via the engagement pin is basically the same as the conventional example. It is the same.

  In the figure, 8GR and 8GL are right and left receiving pieces extending from the inner side edge of the front end portion of the front hammock legs 8F and 8F toward the front center, and fix a shield guide mounting piece to be described later. It becomes a member to do. In addition, right and left said here are referred on the basis of the head of the user who uses a helmet. In the figure, 8HR and 8HL indicate right and left cantilever beams, which will be described later, and forward from the front end portions of the hammock leg portions 8F and 8F via the right and left thick portions 8JR and 8JL. Is provided. Reference numerals 8KR and 8KL denote right and left slide portions that form a U-shaped space in a cross-sectional view formed between the cantilever and the hammock leg tip. Incidentally, 8M and 8M provided in front of the ceiling portion indicate pin holes, which contribute to the mounting of a shield holder described later.

  FIG. 9 relates to a cantilever provided at the tip of the leg portion of the hammock, and is an enlarged front view of the cantilever provided on the front surface of the tip of the hammock leg. 9A is a front view of the right cantilever 8HR viewed from the front, FIG. 9B is a front view of the left cantilever 8HL viewed from the front, and FIG. 9C is a right cantilever. It is the back view (only thick section 8JR sectional view) seen from the human head side state where the above-mentioned hammock bracket is locked in the locking hole which will be described later of the beam 8HR (the cantilever locking hole is mounted on the hammock bracket) The back surface in the above state is seen from the above U-shaped space, but the thick part is not visible, so the thick part is shown in cross section for easy understanding). Here, the right side and the left side refer to the right and left with reference to the human head of the helmet wearer. Therefore, when the cantilever is viewed from the front, the right cantilever is placed on the left side of the viewer and the left cantilever is placed on the right side of the viewer. These right and left cantilever beams 8HR and 8HL have thick portions 8JR and 8JL that support the cantilever beam from the outer side edge of the front end portion of the front end of the leg portions 8F and 8F of the hammock. The cross-sectional view substantially U-shaped slide part 8KR and 8KL which make a concave toward the center of the front is formed. The slide portions 8KR and 8KL function to induce sliding when a face shield described later moves up and down the shield guide and prevent the shield from shifting.

The front surface of the cantilever beams 8HR and 8HL is provided with a locking hole as a locking tool for locking with the hammock bracket. In the drawing, 8L and 8L indicate locking holes formed in the front surface of the cantilever. The locking holes 8L and 8L are configured by central locking guide holes 8L ₁ and 8L ₁ , mounting holes 8L ₂ and 8L ₂ below the center, and retaining pieces 8L ₃ and 8L ₃ that vertically fall from above. Yes.

The locking holes 8L and 8L are for locking to the hammock brackets 1B and 1B formed on the front left and right sides of the helmet shell. First, with the lower ends of the hammock brackets 1B, 1B, the retaining pieces 8L ₃ , 8L ₃ are pushed into the locking guide holes 8L ₁ , 8L ₁ while pushing the retaining pieces 8L ₃ , 8L _3. 1B and 1B are accommodated in the mounting holes 8L ₂ and 8L ₂ . Then, the retaining pieces 8L ₃ , 8L ₃ become vertical so as to support the upper ends of the brackets 1B, 1B, and it is possible to prevent the brackets from being accidentally dropped from the locking holes.

  On the contrary, when removing the bracket from the locking holes L, L, the upper edge of the cantilever is pulled downward while pulling the upper edge of the cantilever toward the center of the helmet, so that the locking hole of the cantilever can be easily removed from the bracket. You can leave. That is, by applying a suitable force through the flexibility of the cantilever beam provided in front of the leg portion of the hammock, the vicinity of the locking hole can be flexibly dealt with and can be detached from the helmet bracket. The possibility of sharing with the conventional example of the present invention relies on such performance that the locking tool and the locking hole can be easily attached to and detached from the hammock bracket. In the figure, 8NR and 8NL are pressing tabs that stably hold the front surface in the vicinity of the side surface of the face shield, which will be described later, and serve as tabs for rotating the cantilever for maintenance and the like. is there.

FIG. 9C shows a state where the locking holes 8L and 8L of the right cantilever 8HR are locked to the hammock brackets 1B and 1B as described above. After the brackets 1B and 1B are locked in the locking holes, it is shown that the brackets 1B and 1B are stably locked by the retaining pieces 8L ₃ and 8L _3. Thus, the legs of the front hammock are shown. This prevents the locking mechanism from unexpectedly failing.

  FIG. 10 is a top view of a shield holder that holds a face shield, which will be described later, as viewed from the shell side of the helmet. In the figure, 9 indicates a shield holder. By the way, the description regarding the hammock from FIG. 8 to FIG. 9C described above and the shield holder 9 of the face shield described later are merely described separately for convenience of description. The hammock 8 and the shield holder 9 are integrally coupled. The method of coupling may be an integral molding by injection molding (injection molding) or a method in which the hammock part and the holder part are molded separately and then coupled together.

In the figure, 9A indicates a mounting portion, and 9A ₁ and 9A ₁ indicate coupling pins for fixing the mounting portion 9A to the pin holes 8M and 8M provided in front of the ceiling portion of the hammock. In the figure, 9B indicates a folded thin portion, and 9C indicates a folded thin portion. In the figure, 9D is a shield guide for guiding while supporting the face shield, 9E and 9E show slit-like rails drilled in the shield guide, and 9F shows flexible elasticity to the left and right slit-like rails. It is a slit-shaped central perforation for imparting the property. The slit-shaped rails 9E and 9E serve as rails that invite sliding when a face shield described later moves up and down.

  The shield holder 9 is once bent backward using the folded thin portion 9B in the vicinity of the attachment portion 9A as a hinge portion, and then folded forward using the folded thin portion 9C as a hinge portion. In this way, the shield holder 9 can be flexibly dealt with swinging up and down and back and forth between the two hinge portions in the vicinity of the attachment portion, and when attaching the face shield, the ceiling portion of the hammock The face shield can be held and accommodated near the center. In addition, it is possible to invite a function to adjust the shield holder so that an excessive force is not applied to the shield holder when the face shield is moved up and down. If necessary, a third thin portion may be added in addition to the two thin portions to provide a more flexible adjustment action.

  In FIG. 11, the attachment part 9A of the shield holder 9D is attached in front of the ceiling part 8A of the hammock, the shield holder is bent backward from the folded thin part 9B, and then bent again through the folded thin part 9C. The longitudinal cross-sectional view (part) which passes along the center of the coupling pin of the aspect descend | falling toward the downward direction is shown. It should be understood from the form of this figure that these two thin-walled parts can be hinged to flexibly move back and forth and up and down, and the adjustment function is performed when the face shield described later is attached and moved up and down. is there.

  In FIG. 10, 9G and 9G are mounting pieces extending left and right from the lower part of the face shield guide 9D, and the legs of the front left and right hammocks are passed through the fitting pins 9H and 9H existing near the respective tips. This is for fitting and fixing to the right and left receiving pieces 8GR and 8GL. It should be noted that, instead of this fitting and fixing, it is difficult to expect the integral molding because of the mold, no matter how the injection molding is performed. Thus, the shield holder having the shield guide is integrally coupled with the hammock, and thus can provide a one-piece member called a hammock shield holder coupling body.

  FIG. 12 is a top view of such a hammock shield holder coupling body in which the hammock and the shield holder are integrally coupled. In the figure, reference numeral 10 denotes a hammock shield holder coupling body, and even when the hammock 8 part and the shield holder 9 part are separately molded, by integrating these into a one-piece shape, the scarcity of component items It aims to make it easier. In addition, this hammock shield holder coupling body 10 is still locked to a hammock bracket formed on the front surface of the hammock leg or the front leg of the hammock on the hammock bracket of the helmet shell. It shows what was developed in a plane where the holes are not engaged. Since the whole is schematically shown, the numbering for each part is omitted.

  FIG. 13A is a front view of the face shield as viewed from the front. In the figure, reference numeral 11 denotes a face shield for protecting the worker's face. 11A is a shield surface, and 11B and 11B are clip mounting holes for attaching a shield clip to the shield. The shield surface 11A of the face shield substantially corresponds to the shield surface 6 described with reference to FIG. 7 in the description of the conventional example, but in the present invention, the protection range of the shield surface 11A is limited. Since it is made as wide as possible, both the vertical dimension and the horizontal dimension are formed correspondingly large. The material of the shield surface 11A has mold retainability and is filled with a transparent synthetic resin. In particular, when polycarbonate is used, it is most suitable as a material for a shield surface because it has high transparency, high impact resistance, and strong dimensional stability.

13 (b) is a front view of the shield clip, FIG. 13 (c) is a bottom view when the shield clip is attached to the shield guide, and FIG. 13 (d) is a left view of the shield clip. It is a direction side view. In the figure, 11C is shielded clip, this compound is formed in a channel-shaped flange comprising a Kakegu forward from the middle of the abdominal 11C ₁ on both sides are upright (the first Kakegu 11C _2, the 2 hooks 11C ₃ ), and the face shield 11 is attached to the shield guide 9D by these hooks. When this shield clip 11C is made of HDPE or the like having high rigidity, water resistance and toughness are imparted and a satisfactory function can be exhibited. Attachment to the face shield of the shield holders, first, the shield first Kakegu 11C ₂ clips 11C and the second Kakegu 11C ₃ from the rear side of the shield guide 9D, the shield guide 9D drilled in the rail 9E , 9E, and then the attachment is completed by engaging the shield clip mounting holes 11B, 11B of the face shield 11 provided at the front end of the first and second hooks from the front. .

  In this manner, the face shield 11 attached to the shield guide through the shield clip 11C moves up and down the rails 9E and 9E on the slit of the shield guide 9D using the shield clip 11C as a slider. be able to.

  A slit-shaped central perforation 9F drilled in the center of the shield guide 9D is viewed from the left and right as the shield clip 11C slides up and down using the two slit-shaped rails 9E and 9E existing on the left and right as guides. Although it will be squeezed, the slit width of the central perforation 9F is somewhat narrowed, and as a result, a smooth up-and-down movement is induced along the rails 9E and 9E existing on the left and right.

  In the two slit-shaped rails 9E, 9E, the upper and lower portions of the slit shape are formed wider than the center portion. This provides a mechanism for reducing the movement of the face clip, which is a slider passing through the rail, by narrowing the slit width at the center of the slit. That is, when the face shield is raised to the uppermost end of the shield guide and maintained in the stowed position, the shield clip is stably stored in the wide slit at the uppermost part of the rail, and the center part is It is suppressed by the narrow slit gap, and sliding down is prevented. For the same reason, when the face shield is lowered to the lowest position of the shield guide and maintained at the working position, even if a rising force is unexpectedly applied to the face shield for some reason, the unexpected rise is prevented.

  Further, when the face shield moves up and down, the side portion of the face shield surface 11A passes through the slide portions 8KR and 8KL formed on the front leg portion of the hammock while sliding. The shield is prevented from shaking from front to back and from side to side, contributing to improved work efficiency. The slide portions 8KR and 8KL are formed inside the cantilever beams 8HR and 8HL which are not affected by the presence of the hammock brackets 1B and 1B provided on the front left and right sides of the hammock shell. Therefore, the width of the face shield can be increased.

  Furthermore, in the present invention, the face shield holder includes a considerably long shield guide. This is because the shield holder is bent rearward in the hammock ceiling portion through two hinge portions, ie, a folded thin portion and a folded thin portion, so that the shield guide can be taken longer. In this way, in the present invention, the face shield can be stored in the helmet considerably deeper than in the conventional example, and as a result, the protection range of the shield surface can be increased during work, Further, it becomes possible to contribute to improvement of the work efficiency of the worker.

  14 (a) and 14 (b) are front perspective views showing the helmet shell and the face shield in a working position where the face shield is lowered below the shield holder. It is a figure for comparing the size of the protection range of a face shield. FIG. 14A shows an embodiment of the present invention. On the other hand, FIG. 14B shows a conventional example. The aspect of the present invention is more reliable than the aspect of the conventional example in that the width and width of the face shield are larger and the area protecting the wearer's face is wider. Therefore, it is possible to expect higher work efficiency.

  The present invention can be variously modified without departing from the basic spirit of the present invention, and the present invention naturally extends to the modified ones.

The top view which turned up the opening of the shell of a helmet. The top view of the hammock which latches to a shell. (A) is a partial front view with the end portion of the hammock leg up, (b) is a side view thereof, and (c) is a state in which the locking tool at the end portion of the hammock leg portion is locked to the shell. The partial front view seen from the shell inner side of the state which carried out. The partial front view seen from the shell inner side of the state which turned up the hammock leg part of the state which mounts a holding frame in the front leg part edge part of a hammock. The partial front view which looked at the headband front side from the shell inner side. (A) is a state sectional view in which a holding frame and a headband are fastened together with an engaging hole of a hammock with an engaging pin, and (b) is a partial front view seen from the shell inner wall side of the hammock. The front view which shows the mounting state of a protection shield surface and the holding frame which supports this. (A) is a bottom view (bottom view) when the hammock is not attached to the helmet and is viewed from the human head side, (b) is a side view when viewed from the front, and (c) is a side view when viewed from the right. (A) is an enlarged front view of the right cantilever formed on the front surface of the front hammock leg, (b) is an enlarged front view of the left cantilever, and (c) is an illustration of the right cantilever. The back surface in a state where the bracket is locked in the locking hole (only the thick portion is a sectional view). The top view of a shield bracket. Sectional drawing (part) which cut longitudinally the center of the attachment pin which attached the attachment part of the shield holder ahead of the hammock ceiling part. The top view of a hammock shield holder coupling body. (A) is a front view of the face shield, (b) is a front view of the shield clip, (c) is a bottom view of the shield clip in the vertical direction, and (d) is a left side surface of the shield clip. Figure. (A) is a perspective view which shows the state of the helmet which lowered | hung the face shield of this invention to the working position. (B) is the state perspective view which fell the face shield of the prior art example to the working position.

Explanation of symbols

1 Shell 1B Hammock bracket (pair)
2 Hammock (conventional example)
3 Holding frame 4 Headband 5 Locking pin 6 Protective shield surface 7 Slider 8 Hammock (present invention)
8A Ceiling part 8B Ventilation hole 8C Leg part (rear)
8D Hammock Locking Tool 8D ₁ Locking Tool Slide Part 8D ₂ Locking Tool Lifting Stop Stopper 8D ₃ Locking Tool Release Stopping Stopper 8E Engagement Hole 8F Leg (Front)
8GR, 8GL receiving piece (right side), receiving piece (left side)
8HR, 8HL cantilever (right side), cantilever (left side)
8JR, 8JL Thick part (right side), Thick part (left side)
8KR, 8KL Slide part (right side), Slide part (left side)
8L Locking hole 8L ₁ Guide hole 8L ₂ Mounting hole 8L ₃ Retaining piece 8M Pin hole 8NR, 8NL Holding tab (right side), Holding tab (right side)
8M Pin hole 9 Shield holder 9A Mounting part 9A1 Connecting pin 9B Bending thin part 9C Folding thin part 9D Shield guide 9E Slit rail 9F Central drilling 9G Mounting piece 9H Fitting pin 10 Hammock shield holder assembly 11 Face shield 11A Shield surface 11B Shield clip mounting hole 11C Shield clip 11C ₁ Shield clip abdomen 11C ₂ , 11C ₃ First hook, second hook

Claims (2)

  Forms a pair of hammock brackets to attach the hammock to the front left and right and rear left and right of the inner surface near the opening edge of the helmet shell, and locks and locks the locking tool formed on the leg of the hammock to the hammock bracket In the helmet in which an engagement hole is formed in the leg portion in the vicinity of the locking tool of the hammock and the headband fixing piece is attached to the engagement hole, the leg portions of the hammock on the front left and right of the hammock The front end of the cantilever is provided with a cantilever beam that forms a substantially U-shaped slide section that is concave from the outer edge of the leg toward the center of the front surface, and the hammock bracket is mounted on the front surface of the cantilever beam. A locking tool is configured by a locking hole for locking and fixing, and a mounting portion of the face shield holder is integrally attached to the front of the ceiling portion of the hammock, and the holder is located below the mounting portion. A rail for raising and lowering the face shield is formed to form a shield guide, and a mounting piece is extended from the bottom end of the shield guide to the left and right, and the tip of the mounting piece is extended to the tip of the leg of the front left and right hammock A face shield mounting device for a helmet, wherein the face shield is mounted on the rail so as not to interfere with a face shield sliding on the slide portion, and the face shield is mounted on the rail so as to be slidable in the vertical direction. Forms a pair of hammock brackets to attach the hammock to the front left and right and rear left and right of the inner surface near the opening edge of the helmet shell, and locks and locks the locking tool formed on the leg of the hammock to the hammock bracket In the helmet in which an engagement hole is formed in the leg portion in the vicinity of the locking tool of the hammock and the headband fixing piece is attached to the engagement hole, the leg portions of the hammock on the front left and right of the hammock The front end of the cantilever is provided with a cantilever beam that forms a substantially U-shaped slide section that is concave from the outer edge of the leg toward the center of the front surface, and the hammock bracket is mounted on the front surface of the cantilever beam. A locking tool is constituted by a locking hole for locking and fixing, and a mounting portion of the face shield holder is integrally attached to the front of the ceiling portion of the hammock, and the holder is attached from the mounting portion. The shield guide has a thin-walled hinge part that bends backward, and a shield guide that is bent through a thin-walled hinge part that folds backward and obliquely downward from the rear, and has a slit-shaped rail that lifts and lowers the face shield. The mounting piece extends from side to side, and the tip of the mounting piece is fixed to the tip of the leg part of the front left and right hammock so as not to interfere with the face shield that slides the slide part, and the slit shape A face shield mounting device for a helmet, wherein a face shield is slidably mounted on a rail through a shield clip.

Images